金工ETF点评：宽基ETF单日净流入22.41亿元，家电、非银拥挤变动幅度较大

• The report constructs an industry congestion monitoring model to monitor the congestion levels of Shenwan First-Level Industry Indices on a daily basis[3] - The report constructs a Z-score model based on premium rates to screen ETF products for potential arbitrage opportunities[4] - The industry congestion monitoring model indicates that the congestion levels of the power equipment and non-ferrous industries were high on the previous trading day, while the food and beverage, and social services industries had lower congestion levels[3] - The Z-score model provides signals for ETF products that may have potential arbitrage opportunities, but also warns of the risk of pullbacks[4]